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US Patent: 1,659,247
Full Automatic Thread Hobbing Machine
Patentee:
John A. Doane (exact or similar names) - Hartford, Hartford County, CT

USPTO Classifications:
144/14, 409/72, 82/124

Tool Categories:
metalworking machines : metal threading machines : thread hobbing and thread milling machines

Assignees:
Pratt & Whitney Co. - New York, NY

Manufacturer:
Not known to have been produced

Witnesses:
Unknown

Patent Dates:
Applied: Jul. 19, 1923
Granted: Feb. 14, 1928

Patent Pictures:
USPTO (New site tip)
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Report data errors or omissions to steward Joel Havens
"Vintage Machinery" entry for Pratt, Whitney & Co.

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